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Part A)
Phosphorus-32 has a half-life of 14.0 days. Starting with 8.00 g of 32P, how many grams will remain after 42.0 days?
Part B)
Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to 1/32.0 of the original amount. How long ago was this plant alive?
Determine the pH of a solution that is 1.80% NaOH by mass. Assume that the solution has density of 1.01 g/ml.
What is the heat change in J associated with 73 g of solid butane at -147 C changing to liquid at -109 oC?
2)Write a net ionic equation for the reaction that occurs when aqueous solutions of sodium hydroxide and nitrous acid are combined. 3)Write a net ionic equation for the reaction that occurs when aqueous solutions of ammonia and acetic acid are combin..
Problem- for the sequence [(O+N2 arrow NO+N)(1) or (NO+H arrow N + OH)(2)] reaction number (2) is the rate determining step. Is the statement true or false?
a 4.50-g sample of licl at 25.0 c dissolves in 25.0 ml of water also at 25 c. the final equilibrium temperature of the
question a chunk of gold with an unknown mass is heated to 163 degrees c and dropped into 38.0 grams of water at 25.0
what is the pH of 1.0 L of a buffer that is .11M HNO2 and .150M NaNO2. what is the pH of the buffer after adding 1.0 mL of 12M HCl. pH of original buffer
a manufacturer of bicycles has 4819 wheels 2305 frames and 2250 handlebars. how many wheels are left over? how many
My organic chemistry lab. How do you extract vanillin from the vanilla bean. Can you use diethyl ether and heat the substance and then use vacuum filtration and heat to get rid of the ether and leave just the vanillin?
How to synthesize 4-acetyltoluene from the following materials choose one from each section. Can only pick one from each section
What is the mole fraction of water in this solution? What is the vapor pressure of the solution at 25 degrees Celsius, given the vapor pressure of pure water at 25 degrees Celsius is 23.8torr
Isooctane is a standard for gasoline octane rating. A sample weighing .5992 g was found to contain .5040 g of carbon and .09515 g of hydrogen. Its molecular mass is 114. Write the empirical and molecular formulas of issooctane(arranging the symbol..
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